4YNG:
reference: Grappling with anisotropic data, pseudo-merohedral twinning and pseudo-translational noncrystallographic symmetry: a case study involving pyruvate kinase., Donovan KA, Atkinson SC, Kessans SA, Peng F, Cooper TF, Griffin MD, Jameson GB, Dobson RC, Acta Crystallogr D Struct Biol. 2016 Apr;72(Pt 4):512-9. doi:, 10.1107/S205979831600142X. Epub 2016 Mar 24. PMID: 27050130

This OCA Structure page
uses Jmol, developed by the Jmol Development Team (documentation).